Mechanical exercising device



Dec. 23,1930. H. E. MccoY l MECHANICAL EXERCIS'ING DEVICE Filed Feb. 8.11929 Patented Dec. 23, 1930 UNITED STATES PATENT OFFICE HARRY E. MCCOY, OF PITTSBURGH, PENNSYLVANIA, ASSIGNOR TO MCDOWELLvMA'NU- FAGTURING COMPANY,OFBIILLVALE, PENNSYLVANIA, A CORPORATION OF PENN- SYLV'ANIA MECHANICAL EXERCISING- DEVICE Application filed February 8, '1929. Serial No. 338,415.

This invention relates to mechanical `enercising devices and more particularly to the class of devices wher-ein straps which pass around the body are connected to a vibrating element and the vibration of such element is transmitted to the body through the straps.

The present invention is an improvement upon the structure shown and described in my co pending application, Serial No. 297,827, tiled August 6, 1928. In that structure there is a lever'pivotally supported midway between its ends for oscillation in a horizontal plane. Extending rearwardly from the center of the lever is a rigid arm having a socket in its end. A motor is provided having an eccentric on its outer end with a ball race and ballsencircling the periphery of thev eccentric. This ball ring is fitted into a vertical vslideway in the socket of said rigid arm, the arrangement allowing the ball ring to move up and down with the rotation ofthe eccentric butserving to transmit lateral movement to `the arm to rock the lever back and forth.

In order'to resist Athe strain the armand the walls of the socket must be of heavy construction and wear plates must be separately provided for the ballV ring to slide upon. Furthermore, due to the fact that `the socket on the rigid arm moves in an arc, the ball ring is transversely convened to provide arounded bearing surface.

The present invention has for its principal obj ect to provide a device whichis relatively lighter and more simple to make and wherein the provision of accurately machined and closely iitting wearing plates are not required, while, at the same time, the machine will operate with a maximum degree of silence and without chatter.

To this end, a universal connection is previded between the ball ring and the oscillating lever through which motion to rock the lever in a horizontal Vplane is transmitted t'o the lever and which provides freedom of movement of the eccentric in other directions.

The accompanying drawings illustrate a present preferred embodiment of the invention in which Figure 1 is a plan view .of a mechanical exercising device embodying my invention;

Figure 2 is a side elevation thereof;

Figure 3 is a transverse vertical section taken along the section line IIIIH of Fig. 1; and j Figure 4is a longitudinal sectional view of a portion of the actuating mechanism talren along the section line IV--IV of Fig.

Referring to the drawings, 2 Vdesignates a base having a motor 3 thereon. At the front of the base is a vertical pivot post. 4 which is rigidly secured to the base and on which is mounted a sleeve 5. The sleeve 5 supports a transverse lever 6 having arms extending substantially equal distances from `each side of the post 4. Projecting .rearwardly and in substantially the plane of oscillation ofthe lever 6 are a pair of posts 7 secured to the lever 6 on opposite sides of thepost 4. v Hooks 8 and 9 are carried on the lever-6, towliich exercising straps 10 are Yselectively attached.

The. base 2 is provided with pinsill to which anchoring straps' 12 are attached.

For oscillating the lever 6 about the 4pivot 4, the motor '3 is mounted lon the base 2 with its shaft 14 in line with the post 4. Theshaft 14 carries an eccentric 15 at its outerend. As shown in Figure 4 the eccentric 15 is secured to the shaft 14 by set `screw 16.

The .outer end of the eccentric 15 is provided with a machined surface 17 terminating in a thread 18. Aball race 19 is inserted over the surface 18 and secured inposition by a nut 20 on the thread 18. A ball ring 21 is .mounted externally of rollers 22 running in a groove 23 inthe ball race19. The

ball ring 21 is enclosed in a housing 24 byA av ring 25 having, a threaded engagement with the housing 24. iEars26 on A.the housing 24 cooperate with a: pivot-ally mounted ear 27 so that the ears 27V are free to move relative to the casing Y24. Coil springs 28 are connected between openings29 in the ears 27 Aand eyes 30 secured to the outer ends of Vthe Vposts 7 by nuts 31. Y

With this construction uponthe rotation of the motor shaft 14 the eccentric 15 causes the casing 24 to Vbe moved'tlirough a circular path therebyalternately tensioning the coil CII springs on the opposite sides thereof. The tension applied to the coil springs 28, which act as illegible links, gradually applies orco to the posts T Y ich oscillate the lever' about the post il vv/thout inmarting any dden shocks to the lever 6. The springs re heavy enough to transmit the necessary lorce to the oscillating lever, even when the weight of a person using ie machine is put upon the straps l0. At the same time the springs yield to allow for the up and down c vel ot the eccentric and also provide "or the arcuate travel of the arms 27.

TWhile I have shown and described the present preferred embodiment of my invention it is to be understood that it may be otherwise embodied within the spirit ot' the invention and the scope of the appended x.laims l claim:

l. A mechanical exercising device comprising a bar pivoter between its ends, a motor, an eccentric ope ted by the motor and flexible links operatively connected to said bar for transmitting motion from the eccentric to the bar.

2. A mechanical exercising device comprising a bar pivoted between its ends, a motor, an eccentric operated by the motor and resilient links operatively connected to said bar for transmitting motion from the eccentric to the bar.

3. A mechanical exercising device comprising a bar pivoted between its ends, a motor, an eccentric operated by the motor and coiled springs for transmitting motion from the eccentric to the bar.

4t. An exercising device comprising a bar pivotally supported between its ends for oscillation in one plane, a motor, an eccentric operated by the motor, a member in which the eccentric revolves, and springs connecting opposite sides of said member to points on said bar at opposite sides of its pivotal mounting.

5. A mechanical exercising device comprising a base member, a lever, a pivot on the base passing through the lever midway between its ends and providing a pivotal mounting for the lever about which the lever may oscillate in a horizontal plane, a motor on the base having a horizontal shaft which is substantially in line with the pivot, an eccentric on the Ymotor shaft, a ball race embracing the eccentric, and a spring connecting one side of the ball race with one side of the lever and another spring connecting the other side of the ball race with the other side of the lever.

6. A mechanical exercising device comprising a base member, a lever pivota-lly supported on the base member, a motor on the base having a shaft with an eccentric thereon, a member in which the eccentric revolves, anti-friction bearings interposed between the S ll member and the eccentric, anti-resilient links for transmitting motion from the member to the lever on opposite sides of its pivotal mounting.

7. In a mechanical exercising device, a base, a lever mounted on the base for oscillation in a horizontal plane, a power driven eccentric, an enclosing member in which the eccentric operates, and a iiexible universal connection between said member and said lever for transmitting motion from the eccentric to the lever in a horizontal plane only.

8. In a mechanical exercising device, a bar pivoted between its ends, a motor, an eccentric operated by the motor, flexible links operatively attached to said bar on either side of the pivot, and means for transmitting motion from the eccentric to said links.

9. In a mechanical exercising device, a bar pivoted between its ends, a motor, an eccentric operated by the motor, spring means operatively attached to said bar on either side ol2 the pivot, and means i'or transmitting motion from the eccentric to said spring means.

l0. A mechanical exercising device coniprising a base, a lever pivotally supported intermediate its ends on said base, a motor having a shaft, an eccentric on the shaft, and Flexible links operatively connected to said bar for transmitting motion from the eccentric to the bar.

ll. A mechanical exercising device comprising a base, a lever pivotally supported intermediate its ends on said base, a motor having a shaft, an eccentric on the shaft, flexible links operatively connected to said bar, and means for transmitting motion from the eccentric to the links.

l2. A mechanical exercising device comprising a bar pivoted intermediate its ends and having posts attached thereto on either side oit' the pivot, a motor, an eccentric operated by the motor, coiled springs attached to said posts, and means for transmitting motion from the eccentric to said springs.

In testimony whereof I have hereunto set my hand.

HARRY E. MCCOY.

loe 

